Let us take you on a data world tour: for global comparisons and maps, scroll down.
If instead you are looking for an overview of the policies affecting international students in the major destination countries, take your pick:
How international institutions are promoting climate literacy and reducing carbon footprints
Which countries have the most liberal post-study work policies in place for their successfully educated and onshore international students?
International student numbers in the top destination worldwide reported to IIE Project Atlas